>>196844fpbp
Avengers Alliance was better than it had any right to be: gorgeous artwork (pic related), surprisingly deep gameplay and a roster that included a lot of obscure choices. It even had themed events tied to the MCU movies that were released around the time.
It started losing its steam the moment the microtransactions became unbearable like with the comic covers in order to obtain the villains.
Contest of Champions is the mobile title i've been following and while its own roster is shaping up to be interesting as well, it's a bit too slow in how it updates for me.